"Coming to the Slams just reinforces it - you see the Slovaks and the Croats and the Serbs and they work hard and have the right attitude.

"You don't see them missing training and leaving their rackets at the hotel.

"We're trying to explain to all these players that they're role models to the 13 and 14-year-olds and that's starting to sink in with a few of them. We've got to hope we get the right reaction from Marcus."

It is not clear whether any further action will be taken against Willis, who reached the third round of junior singles at Wimbledon last year.

"We'll deal with that when we get home," said Draper.

Former British number one Chris Bailey said: "How stupid can you be? How do you arrive at the courts without your rackets?

"For me, it's about respect for the organisation which is giving you opportunities and the coaches who are trying to help you."

"In my day, you couldn't afford to miss these sort of chances. It's good that the LTA is sending out a tough message."

The International Tennis Federation confirmed Willis' withdrawal from the junior competition.

"He's been withdrawn by the LTA for constant bad behaviour," said a spokesman.